Meet the bluefin tuna, the toughest fish in the sea | Grantly Galland and Raiana McKinney

The Atlantic bluefin tuna is a large, long-lived predator with unique adaptations like warm-bloodedness, allowing it to thrive in cold waters. It can swim at speeds up to 40 mph, making it a formidable hunter. Bluefin tuna have a wide range, migrating across the Atlantic for feeding and spawning. However, they face threats from overfishing due to high demand for sushi and sashimi. Conservation efforts are crucial for their population recovery.

What unique adaptation allows the Atlantic bluefin tuna to maintain its body temperature?

• Powerful muscles

• Countercurrent exchange

• Streamlined body shape

• Regional endothermy

How does the Atlantic bluefin tuna's body shape contribute to its speed?

• It has a flat body for better gliding.

• Its fins are large and always extended.

• It has a torpedo shape with retractable fins.

• Its body is covered in scales that reduce drag.

Why must the Atlantic bluefin tuna constantly swim?

• To find food

• To avoid predators

• To maintain its body temperature

• To ensure a constant flow of water over its gills

At what age do Atlantic bluefin tuna typically return to their birthplace to reproduce?

• 10 years

• 5 years

• 20 years

• 15 years

What has led to the increased vulnerability of Atlantic bluefin tuna to human fishing?

• Their slow swimming speed

• Their inability to reproduce in captivity

• Their limited range

• Their large size and high market value